Tool for dressing and turning emery-wheels



(M (11.) 0 e G. J. & s. J .-SHIMER.

Tool for Dressing and Turning-Emery Wheels.

No. 240,279. Patented April 19, 1-881;

NJETERS. VHOTOJ-ITHOGRAPUIER, WASHINGTON. D C.

UN ITED STATES PATENT OFFICE.

GEORGE J. SHIMER AND SAMUEL J. SHIMER, OF MILTON, PENNSYLVANIA.

TOOL FOR DRESSING AND TURNING EMERY-WHEELS.

SPECIFICATION forming part of Letters Patent No. 240,279, dated April19, 1881.

Application filed March 5, 1881.

To all whom it may concern:

Be it known that we, GEORGE J. SHIMER and SAMUEL J. SHIM'ER, citizens ofthe United States of America, residing at Milton, in the county ofNorthumberland and State of Pennsylvania, have invented certain new anduseful Improvements in Tools for Dressing and Turning Emery and Similar*heels; and we i do hereby declare the following to be a full,

clear amhexact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters orfigures of reference marked thereon, which form a part of thisspecification.

This invention has relation to tools for truing and turningemery-wheels.

Our invention consists in a metallic bar having a longitudinal channelor groove formed therein, capable of receiving two or more steelplatesprings to serve the office of cutters.

Our invention also consists in a metallic bar having a channel formedtherein to receive two or more steel-plate spring-cutters, and a sleevefitting the bar over the spriiigcutters, and a set-screw in the sleeveto secure and clamp the spring-cutters in position for use.

Our invention further consists in a transparent shield set in the upperpart of the sleeve, to act as a protection to the eyes of the operatorand to afford unobstructed vision in the turning of the stone.

Our invention further consists in the combination, with a metallic barprovided with a longitudinal channel and two or more steel springs, of asleeve provided with a set-screw.

Our invention further consists in the combi nation, with a metallic barprovided with a longitudinal channel to receive two or more steelsprings, and a sleeve provided with a setscrew, of a diagonal slot and atransparent shield.

In the accompanying drawings, Figure 1 is a perspective view of thetool, showing the mode of operation. Fig. 2 is a perspective view of thetool complete. Fi .3 is a perspective view of the adjustable sleeve.Fig. 4 is a perspective view of one of the steel bars constituting acutter, and Fig. 5 is a front view of the transparent shield.

(Model) In the accompanying drawings, the letterA represents a metallicbar, having formed therein the longitudinal channel or groove a,intended to receive two or more cutters consisting of steel-platesprings, as seen in'Fig. 2 of the drawings.

The letter B represents the adjustable sleeve, which fits over the bar Aand secures the plates forming the cutters in position. Thisadjustablesleeve is preferably of the shape shown in Fig. 3 of the drawings, andis provided with legs serving as rests for the tool when in operation,as seen in Fig. 1 of the drawings.

The letter C (see Fig. 4) represents a plate or bar spring of steel,made of such width as to fit in the longitudinal channel or groove ofthe bar. Two or more of these plates are placed together in the channel,as shown in Fig. 2 of the drawings, wherein they are confined at theirforward parts by means of the adjustable sleeve provided with theset-screw. The set-screw b in the upper part of the adjustable sleevepasses through the metal of the sleeve and screws down on, thebar-springs, thus clamping them firmly in the channel and together.

The letter 0 indicates a diagonal slot out in the sleeve, and in it isfitted the transparent shield D. (See Fig. 5.) The object of the shieldis to protect the operators face and eyes from the flying particles ofemery and stone during the process of dressing the wheel,

and at the same time enable him to see the progress of the work. Thisshield is preferably of mica, and has at its base a metal strip tostrengthen it at that .part, and to prevent it from flaking or beingotherwise injured in putting it in position.

The channeled bar has an ordinary tool-handle attachment, or it may bemade with the handle forming an integral part of the bar.

It will be observed that the plates of steel are secured against lateraldisplacement by the side walls of the channel of the bar, and aresecured against undue vibration by the sleeve and the downward pressureof its setscrew.

The tool in its several parts having been described, the mode ofadjusting and uniting them for use is readily understood. The adjustablesleeve with set-screw drawn above the upper wall of the passage ispassed over the metallic bar from its forward end, and the steel barsare then run under the sleeve, and when in position they are clampedfirmly in place with the set-screw. The transparent shield is thenadjusted in the diagonal slot of the sleeve. The adjustment of the partsmay be varied by first placing the steel bars in the channel of themetallic bar and then passing the sleeve over them and the bar andsecuring the bar-springs, as stated hereinbefore. The steel bars arearranged and adjusted at their forward or cutting ends so that theuppermost shall be advanced in the direction of the emery-wheel fartherthan its mate beneath, and this, in turn, also advanced farther in samedirection than its mate beneath, and so on to thelast. This issubstantially shown in Fig. 2 of the drawings. The object of thisgradual recession from top to bottom plate is that each spring shallpresent a cutting or picking edge to the surface of the wheel.

The operation is accomplished by holding the tool, like an ordinaryturning-tool, a little above the center of the emery-wheel, (see Fig.1,) so that the steel springs will vibrate, when, instead of beingground away by the wheel, they pick against the face of the wheel andturn it oft, each spring acting in the nature of a small mill-pickdriven at a very high speed.

In practice it will be found that the springs are worn away very slowly.

In turning very hard and compact wheels, the steel cutters or pickersare set closer to the forward end of the channel than when soft wheelsare turned or dressed. For soft 01 en wheels the steels are set aboutone-half inch beyond the end of the bar and the set-screw about two anda half inches back.

The tool can also be used to take the glaze 011 of the hard closewheels, in which operation it is the better plan to rest the tool on thehand, and not to let it touch the solid rest.

It is obvious that the groove or channel in the bar may be dispensedwith,,and the steel spring-cutters rest on the flat top of the bar andretained in this position by means of the top and side walls of thesleeve.

We do not wish to confine ourselves to the precise construction hereindescribed and What we claim as our invention, and desire to secure byLetters Patent, is

1. In a hand-tool for truing and turning emery and similar wheels, themetallic bar provided or formed with a longitudinal channel or groove toreceive two or more steel-plate spring-cutters.

2. In a hand-tool for train g or turning emery or similar wheels, thecombination of a metallic bar, two or more spring bar cutters, and aholding-sleeve, substantially as described.

3. In a hand-tool for truing and turning emery and similar wheels, thecombination of the metallic bar formed with a longitudinal channel orgroove, two or more spring bar cutters fitting within said groove, and aholdingsleeve, substantially as described.

4. In a hand-tool for truing and turning emery and similar wheels, thecombination of a metallic bar formed with a longitudinal channel orgroove, with two or more spring bar cutters arranged therein, and anadjustable sleeve with a set-screw, substantially as described.

5. In a hand-tool for truing and turning emery and similar wheels, thecombination of a metallic bar formed with a longitudinal channel orgroove, with two or more spring bar cutters arranged therein, a sleeve,and a transparent shield.

6. In a hand-tool for truing and turning emery and similar wheels, thecombination of a metallic bar formed with a longitudinal channel orgroove, with two or more spring bar cutters arranged therein, and anadjustable sleeve with a set-screw, and a transparent shield,substantially as described.

7. As a new article of manufacture, a mica transparent shield having ametallic bindingedge, for the purpose set forth.

8. In a hand-tool for truing and turning emery and similar wheels, thesleeve capable of a sliding or adjustable movement, and formed with adiagonal slot to receive a transparent shield, and provided with aset-screw, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

GEO. J. SHIMER. SAML. J. SHIMER.

Witnesses:

ELAM D. DIFFENDERFER, ELMER S. SHIMER.

